People leave Mailchimp for ActiveCampaign when they've hit the ceiling on what a Customer Journey can do. Mailchimp's automation builder handles linear sequences well enough, but branching logic, lead scoring, and a CRM attached to the same contact record are either absent or bolted on. ActiveCampaign was built around automation first and email second, and it shows in the depth of the workflow editor.
The trade-off is a genuine learning curve. ActiveCampaign's interface exposes far more configuration than Mailchimp ever did, and the first few hours in the automation builder can feel like starting over rather than switching tools. Contacts, tags, custom fields, and deals all interact in ways that take a session or two to internalise properly.
This guide covers the mechanical migration: getting contacts and their tags across cleanly, translating a Mailchimp journey into an ActiveCampaign automation with conditional splits, deciding whether to set up deal pipelines, and installing site tracking before you rely on behavioural triggers. Read it end to end before touching anything, because the order you do these steps in determines whether your automations fire correctly on day one.
How long this takes
3–5 hours
Most of that time goes into rebuilding automations and repointing forms, not the import itself.
Why switch from Mailchimp to ActiveCampaign?
Switch if…
- You need branching automation logic — if/else splits based on behaviour, not just linear sequences.
- You want a CRM with deal stages attached to the same contact record as your email history.
- You need site tracking to trigger automations from page visits, not just email opens and clicks.
- Your list has stopped growing but your automation needs have grown past what Mailchimp’s Journeys builder supports.
- You want lead scoring to prioritise sales follow-up based on engagement.
Stay put if…
- Your team needs a genuinely fast learning curve — ActiveCampaign’s builder has real depth and takes longer to master than Mailchimp’s.
- You rely mainly on Mailchimp’s template gallery and design tools, which are more polished than ActiveCampaign’s.
- You don’t need a CRM or conditional automation and would be paying for capability you won’t use.
Mailchimp vs ActiveCampaign: the key differences
| What changes | Mailchimp | ActiveCampaign |
|---|---|---|
| Contact model | Multiple audiences, each siloed | One contact database, segmented by tags and lists |
| Automation depth | Mostly linear Customer Journeys | Branching workflows with conditional splits |
| CRM | None | Deal pipelines built in |
| Site tracking | Basic, limited triggers | Full behavioural tracking script |
| Lead scoring | Not available | Built into the automation engine |
| Template editor | Polished drag-and-drop | Functional but less refined |
| Learning curve | Shallow, quick to start | Steeper, rewards time invested |
| Migration support | Self-serve only | Assisted migration service on qualifying plans |
Before you switch, have this ready
- Admin access to both Mailchimp and ActiveCampaign.
- Check whether your ActiveCampaign plan qualifies for the assisted migration service before doing anything manually.
- A written map of every Mailchimp audience, tag, and segment you currently rely on.
- Screenshots of each active Customer Journey, including its triggers, delays, and branch conditions.
- A decision on whether you need deal pipelines, and what your sales stages should be called.
- Access to your website’s code or tag manager to install the ActiveCampaign tracking script.
Step-by-step: Mailchimp to ActiveCampaign
Step 1: Decide whether to use ActiveCampaign’s migration service or export manually
ActiveCampaign offers a migration service on higher-tier plans that can move contacts, tags, and in some cases automations and templates on your behalf. Ask your onboarding contact or support before you start manually exporting — it can save several hours and avoids the field-mapping errors that come with a manual CSV import.
If you don’t qualify or prefer to control the process yourself, go to Mailchimp’s Audience → All contacts and export each audience as CSV, keeping the tags and merge fields columns intact.
Whichever route you choose, export your unsubscribed and cleaned contacts separately so you can suppress them in ActiveCampaign rather than accidentally re-emailing people who opted out months ago.
Screenshot
Mailchimp Audience export screen with tags column visible
Step 2: Build your field and tag structure in ActiveCampaign first
ActiveCampaign uses one contact database rather than separate audiences, so decide upfront how your Mailchimp audiences map across — usually to a combination of lists and tags rather than a one-to-one copy.
Go to Contacts → Manage Fields and recreate every custom field you use for personalisation or segmentation. Getting this right before import avoids a second clean-up pass later.
Create the tags you’ll need for segmentation and automation triggers. Tags in ActiveCampaign do more work than they did in Mailchimp — they drive automation entry conditions as well as segmentation, so name them with that in mind.
Screenshot
ActiveCampaign Manage Fields screen
Step 3: Import contacts and apply tags
Go to Contacts → Add contacts → Import contacts and upload your CSV. ActiveCampaign lets you apply a tag to every contact in the import batch, which is the fastest way to recreate a Mailchimp audience distinction.
Map each CSV column to the matching custom field carefully — mismatched mapping is the most common cause of blank personalisation fields in your first ActiveCampaign campaign.
Import your suppression list (unsubscribed and cleaned contacts) and mark them unsubscribed in ActiveCampaign immediately, before any automation has a chance to email them.
Screenshot
ActiveCampaign contact import mapping screen
Step 4: Rebuild Customer Journeys as automations with conditional splits
Nothing automated transfers unless you used the assisted migration service. Prioritise the journeys that actually drive revenue — typically a welcome sequence and one or two nurture flows — and rebuild those first.
In Automations → New Automation, start from a trigger that matches your Mailchimp entry condition (tag added, form submitted, date-based). Then use the "If/Else" action to add the conditional logic Mailchimp couldn’t do — branching by engagement, purchase history, or custom field value is where ActiveCampaign earns its reputation.
Rebuild the email content in ActiveCampaign’s editor rather than pasting Mailchimp HTML across, since pasted markup tends to break on mobile.
Test every branch with a dummy contact before turning the automation live, walking each path to confirm the conditional logic sends people down the right route.
Screenshot
ActiveCampaign automation builder showing an If/Else conditional split
Step 5: Set up deal pipelines if you need CRM functionality
Go to Deals → Pipelines and create a pipeline with stages matching your actual sales process — don’t just copy a generic template, since a pipeline nobody updates is worse than no pipeline.
Decide which automations should automatically create a deal or move it to the next stage, such as a high-intent tag being added or a demo request form being submitted.
If your team is new to using a CRM alongside email, start with one pipeline and one owner before rolling it out more broadly — adoption is the harder problem, not the setup.
Screenshot
ActiveCampaign Deals pipeline board with stages
Step 6: Install the site tracking script
Go to Settings → Tracking and copy the tracking script into your site’s header, either directly or through a tag manager. This has to be live before any "visited page" automation trigger will fire correctly.
Once tracking is active, ActiveCampaign starts attributing site visits to known contacts, which unlocks triggers like "visited pricing page" or "abandoned a specific product page" that Mailchimp’s more basic tracking couldn’t offer.
Give tracking a day or two to start populating before you build automations around it, so you can confirm events are firing before you depend on them.
Screenshot
ActiveCampaign Settings → Tracking script screen
Step 7: Test, repoint integrations, and ramp sending
Work through every website form, plugin, and Zapier or native integration currently pointed at Mailchimp and repoint it to ActiveCampaign. Test each one with a live submission.
Send your first ActiveCampaign campaign to contacts who opened in the last 30 days and compare open rates against your Mailchimp baseline before widening the send.
Keep Mailchimp active for two weeks and watch for new signups landing there — it tells you exactly which form you missed.
Screenshot
ActiveCampaign campaign report comparing opens for the seed send
Integrations you need to update
Every one of these is a place contacts or data currently flow into Mailchimp. Work through the list before you stop watching the old account — a missed form is invisible until someone complains they never got your email.
| Integration | What to do |
|---|---|
| Website signup forms | Replace Mailchimp embeds with ActiveCampaign forms and test a live submission. |
| WordPress | Swap the Mailchimp plugin for ActiveCampaign’s and reconnect each form. |
| Shopify or WooCommerce | Connect the native ActiveCampaign integration and confirm order sync before disconnecting Mailchimp. |
| Zapier / Make | Rebuild every scenario with the ActiveCampaign connector — nothing remaps automatically. |
| Facebook / Instagram lead ads | Reconnect lead forms to ActiveCampaign so leads stop landing in an unmonitored Mailchimp account. |
| CRM or helpdesk | Decide whether ActiveCampaign’s own Deals replaces your existing CRM or needs to sync with it. |
| Calendly or scheduling tools | Reconnect booking events so they can trigger deal-stage changes or automations. |
| Site tracking / analytics | Install the ActiveCampaign tracking script alongside, not instead of, your existing analytics. |
Troubleshooting: common post-migration problems
Automations aren’t triggering on page visits
The site tracking script isn’t installed correctly or hasn’t had time to start logging events. Check Settings → Tracking for a live status and wait 24–48 hours before troubleshooting further.
Tags imported but automations don’t recognise them
Confirm the tag name matches exactly, including case, between your automation trigger and the imported tag — ActiveCampaign treats them as distinct strings.
Deals aren’t being created automatically
Check that the automation action is set to "Create Deal" or "Move to Stage" and that the pipeline referenced still exists — renaming a pipeline after building the automation breaks the link.
Personalisation fields are blank in the first campaign
Column mapping was off during import. Re-check Contacts → Manage Fields against your CSV headers and re-import if necessary; ActiveCampaign updates existing contacts by email match rather than duplicating.
The automation builder feels overwhelming compared to Mailchimp
Rebuild one simple automation first — a single welcome email with no branches — before attempting the full conditional-split version of your Mailchimp journey.
Unsubscribed Mailchimp contacts received a new campaign
The suppression file wasn’t imported before sending. Import it now, mark those contacts unsubscribed, and pause any live automation until it’s done.
Should you make the switch?
The migration itself is rarely the hard part — it is the automations you rebuild and the forms you forget. If the reasons in the "switch if" list above describe your situation, ActiveCampaign is worth the afternoon. If you are only moving because you are frustrated with an interface, fix the emails first and keep the platform.
Read both sides before you commit: our Mailchimp review covers what you would be giving up, and our ActiveCampaign review covers what you are buying, including current pricing and where it falls short. Every switch we document is listed on the migration guides hub.